Improvement in paper-cutting machines



UNITED STATES GEORGE A. WALKER, OE BOSTON, MASSACHUSETTS.

IMPROVEMENT IN PAPER-CUTTING MACHINES. l

Specication forming part of Letters Patent No. 118,308, dated August 22, 1871.

To all whom it may concern:

Be it known that I, GEORGE A. WALKER, of Bost-on, in the county of Suffolk and State of Massachusetts, have invented an Improved Paper-Cutting Machine; and I do hereby declare that the following, taken in connection with the drawing which accompanies and forms part of this speciiication, is a description of my invention, sufficient to enable those Skilled in the art to practice it.

My invention relates to the arrangement of the mechanism and the method of opera-ting the knife of that class of paper-cutting machines in which the cutter-bar or stock moves vertically between suitable ways or guides, and hasv a downwardin clined vertical movement for its cuttin g-stroke.

rIhe drawing represents a front view of a machine embodying my'invention, and an end view of the cutter-frame and guides.

ar denotes the frame of the machine; b, the knife-stock 5 o, the table upon which the paper is supported. Over this table, at each end of it, are uprights d e, between which the knife-bar or Stock b reciprocates, and by which it is guided, the stock being' hung from a cross-beam or head, j', by links g g. h denotes the knife xed to the stock in the ordina-ry manner. From the opposite ends of the stock (outside of the frame al) two vertical bars, t k, depend, and the lower ends of these bars are connected by a rail, Z, which runs through vertical slots min the opposite uprights of the frame a., the stock b, bars t' k, and rail Z constituting a cutter-frame, which, with the guidin g-surfaces, insure correct vertical movement of the knife. At one end of this frame is anoblong slot, n, in which rotates an eccentric, o, on a shaft, p, and the rota-tion of this eccentric imparts a quick movement to the cutter as it first descends, and a slow but powerful downward and longitudinal movement to it as it cuts through the paper. The eccentric may be rotated by any suitable mechanism, that shown being abeveI-gear, q, on the shaft p, and a bevelpinion, r, on a drivin g-shaft, s. The slotted frame may be driven by a crank Operatin g on a sliding box reciprocating vertically in the slot n,- but I prefer the employment of the eccentric.

The machine thus constructed or organized is very simple, effective, and enduring, and may be kept in perfect running order at but very slight expense, and without lia-bility to breakage or necessity of repairing.

The lower end of the bar t' is slotted, and the end of the rail lextends through the slot t, the bart being confined in position by screws u o. The slot is wider than the thickness of the end of the rail, and, by means of the screws, the bar 1'., and thereby the knife-stock, may be adjusted to keep the straight side of the cutter close up to the uprights d d, so that it shall cut in a true plane.

I claim- The cutter-frame, guided as shown and described, and having the cutter-stock adjustable by means of the adjusting-screws u u or their equivalent, substantially as shown and described.

GEORGE A. WALKER.

FRANCIS GOULD, S. B. KIDDER. 

